@Turtle91...Thanks for your question and its a good question(though off-topic). In my discussions with Hitch I was actually trying to determine whether using inline styling with % dimensions would actually work on KF7 devices. I asked this question because the eInk displays on the older KP app showed that the test image image(a hawk) displayed correctly as far as I was concerned. That was what our discussion was really all about.
And you needn't worry about how my plugin works because my plugin adds media queries in the accepted way and also dual formats all the images in the ebook for KF7(in pixels) and KF8(as a %) devices. Hitch has also said that the plugin, which she has tested, works fine. Just to also add that Hitch requested this plugin -- she's a professional formatter -- so you should perhaps just accept that this is the proper way to format images for KF7 and KF8 devices in an epub.
If you want to test the new plugin(which hasn't been released yet) just to check and test it for yourself then the download is here on this thread:
https://www.mobileread.com/forums/sh...9&postcount=33
Also, for more info on its features -- you should read the README file that is inside the downloaded plugin zip file.
I also note that Hitch is still blasting -- even after I apologized...Well, well...